OpenAI web search tool alternatives
The built-in search tool in the Responses API. Zero integration work if you are already on OpenAI, and no control over retrieval whatsoever.
Verified 5 August 2026·Figures from vendors' own pages
OpenAI web search tool at a glance
- Vendor
- OpenAI
- Category
- Platform grounding
- Own index
- Partial — Third-party index behind an OpenAI tool
- Price per 1,000
- Not published as a flat rate
- Free tier
- None separate from API credit
- MCP server
- No
- Graph traversal
- No
- Coverage transparency
- No
Pricing detail. Billed as a tool call within the Responses API rather than as a standalone search rate.
The alternatives
unlob
$0.40/1kOur own index, admitted rather than ranked. Metadata-only passage hits, six coverage-graph traversal tools, an MCP server, and an endpoint that tells you why any URL is or is not in the index. Smaller than the well-funded incumbents, and considerably cheaper than all of them.
Grounding with Google Search
$14/1kGoogle's first-party grounding for Gemini. The best index in the world, billed per search query on top of tokens, and only usable from Gemini.
Perplexity Sonar
$14/1kSearch and synthesis in one call. You get an answer rather than results, which is convenient until you need to control retrieval yourself.
Grounding with Bing Search
Microsoft's designated successor to the retired Bing Search API, available only inside Azure AI Foundry. A platform commitment, not an API swap.
Bing Web Search API
For a decade the default independent web search API. Retired on 11 August 2025, taking Web, Image, News, Video, Entity and Custom Search with it.
Retired 11 August 2025
DataForSEO
$0.60/1kIndustrial SERP infrastructure built for SEO tooling rather than agents. The cheapest per query in the field, with the lowest-level API to match.
Parallel Search
$1/1kA suite of web search, extraction and research APIs on a proprietary index, from the former Twitter CEO. The closest competitor to unlob by thesis.
Serper
$1/1kThe cheapest way to get raw Google results into an agent. Fast, minimal, and entirely dependent on Google continuing to be scrapeable.
Brave Search API
$5/1kA genuinely independent index of 40B+ pages, sold as a conventional search API with an LLM-context option. Long the default independent choice.
Free developer tier removed February 2026
Sources
- OpenAI pricingread 5 August 2026
Frequently asked questions
What is the best alternative to OpenAI web search tool?
It depends what you are replacing. If you need an independent index at the lowest price, unlob is $0.40 per 1,000 queries. If you need the largest possible index, OpenAI web search tool may still be the right tool — we say so on our comparison page rather than pretending otherwise.
Does OpenAI web search tool own its own web index?
Partly — Third-party index behind an OpenAI tool. It operates its own retrieval layer but is not a fully independent web index.
How much does OpenAI web search tool cost?
Billed as a tool call within the Responses API rather than as a standalone search rate.
Try the cheapest own-index alternative
10,000 free requests a month, no card. Test coverage and latency against your own queries before you commit to anything.